IGST refund, PFMS rejected, any clues how to handle

Exporters face IGST refund issue where scrolls are cleared by ICEGATE/customs (SB000) but rejected at PFMS despite no bank changes. Likely causes include IFSC mismatch, bank merger issues, AD code mismatch, or one IEC causing full scroll rejection. Solution: verify bank/AD code with customs, contact ICEGATE/PFMS, and request scroll regeneration via CHA.